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Rosy Tetras

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Ok, I'll be moving my goldfish out of the indoor tank and I'm looking at introducing Rosy Tetras. This is a 30 g tank, and their 'friends' will be 2 oto algae eaters and 2 south american catfish. Do you think will be suitable? I was reading that they recommend at least 6 to school, should I add them all at once?

Good tank mates and if your tanks cycled; you can add them all. The Oto's and I assume they are Cory's realy should be kept in bigger schools for them to realy be happy.

Great choice with the Rosy's by the way. One of my favorites. You might consider 8.

Perfection is not attainable, but if we chase perfection we can catch excellence.
Once you learn to quit, it becomes a habit. -Vince Lombardi
“Be more concerned with your character than your reputation, because your character is what you really are, while your reputation is merely what others think you are.” ― John WoodenSandy Hook Elementary......Lest We Forget
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the catfish are little south american bumblebees. kind of reclusive. I may see one every few days at night. The otos are the little algae eaters. I only have 2. With the goldfish wintering in the aquarium this last year, I didn't want to overload it any more than I had. Should I have more than 2 of those?
I want to have fish that the catfish can't eat, enough that I can enjoy and they can be happy without making it too confining. Does that make sense? Am I doing this right?

The Bumblebees should be fine but I would increase your Oto's to five. Their shape makes the Rosy's a good choice because the bumblebees can't swallow them. Watch out that an Oto does not go missing. Bumblebee's are realy nocturnal fish that like to hunt when the lights are out.

Perfection is not attainable, but if we chase perfection we can catch excellence.
Once you learn to quit, it becomes a habit. -Vince Lombardi
“Be more concerned with your character than your reputation, because your character is what you really are, while your reputation is merely what others think you are.” ― John WoodenSandy Hook Elementary......Lest We Forget
See my profile for my tanks and what fish I keep

Ok, sounds good. I've had the cats for about 3 months,got them at about the same time as the Otos. The Otos must must hide really well too.
So with 6 Tetras, 5 Otos, and 2 2 inch cats...I won't overwork this tank?
Btw, I have a penguin 200 and a tetra 20/40 hobs. I added ceramic bio media rings to the penguin

I don't think you will "overwork" the tank and I still think 8 Rosy's will still work.

Perfection is not attainable, but if we chase perfection we can catch excellence.
Once you learn to quit, it becomes a habit. -Vince Lombardi
“Be more concerned with your character than your reputation, because your character is what you really are, while your reputation is merely what others think you are.” ― John WoodenSandy Hook Elementary......Lest We Forget
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well i'm slowly moving my goldfish. pretty much, one a water change. the ammonia is finally coming to terms.. But I went and checked with my lfs and they do quarantine their fish, but they don't carry rosy tetras. Is there another variety with the same personality and size?

Not as colorful but Lemon tetras might be something to look for. Flame or Von rio are nice but just a little smaller then Rosy's. Columbian are very colorful and get a little bigger. Black phantoms are another good choice that's about the same size. One more would be Bleeding hearts; that look alot like Rosy's but get bigger.

Perfection is not attainable, but if we chase perfection we can catch excellence.
Once you learn to quit, it becomes a habit. -Vince Lombardi
“Be more concerned with your character than your reputation, because your character is what you really are, while your reputation is merely what others think you are.” ― John WoodenSandy Hook Elementary......Lest We Forget
See my profile for my tanks and what fish I keep

One more to look for that's not as colorful but have a nice look is the Head and tail light. There shape would keep them from becoming dinner for your catfish.

Perfection is not attainable, but if we chase perfection we can catch excellence.
Once you learn to quit, it becomes a habit. -Vince Lombardi
“Be more concerned with your character than your reputation, because your character is what you really are, while your reputation is merely what others think you are.” ― John WoodenSandy Hook Elementary......Lest We Forget
See my profile for my tanks and what fish I keep